This study examines how digital participatory platforms influence urban heritage revitalization in historic cities, emphasizing cases from Madrid, Helsinki, Reykjavik, Amsterdam, and Barcelona. Traditional top-down governance often limited community input, hindering project sustainability and acceptance. To address these gaps, contemporary approaches use digital tools (e.g., mobile apps, GIS, online forums) to foster direct citizen engagement and transparent decision-making. Analysis reveals platforms such as “Decide Madrid,” “FixMyStreet,” and “Maptionnaire” improve citizen participation and transparency. Moreover, “Amsterdam Smart City” and “Decidim” demonstrate substantial entrepreneurial impacts through CivicTech startups, enhancing economic and cultural outcomes. However, significant challenges persist, including digital divides, platform usability issues, and data privacy concerns. The study recommends integrated digital-traditional participation models, improved platform design, and targeted digital literacy initiatives to maximize effectiveness and equity.